<?php
$br = "<br/>\n";
//"0"！=null
var_dump('0' == null ?  '"0"==null' :   '"0"！=null');
var_dump('0' == false ?  '"0"==false' :   '"0"!=false');
var_dump (null == false ?  'null==false' :   'null!=false');


var_dump ('0.00' ?  '"0.00" is true' :   '"0.00" is false');
echo $br;
var_dump (0 == '' ?  '0 is ""' :   '0  != ""');
var_dump (0 == 'abc' ?  '0 is "abc"' :   '0  != "abc"');

var_dump (1 == '1abc' ?  '1 is "1abc"' :   '1  != "1abc"');
echo $br;

var_dump(strval(0), intval(''), intval('abc'), intval('1abc'));
